forked from OSchip/llvm-project
152 lines
3.8 KiB
C++
152 lines
3.8 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify -pedantic -Wc++11-compat %s
|
|
//
|
|
// Tests explicit instantiation of templates.
|
|
template<typename T, typename U = T> class X0 { };
|
|
|
|
namespace N {
|
|
template<typename T, typename U = T> class X1 { };
|
|
}
|
|
|
|
// Check the syntax of explicit instantiations.
|
|
template class X0<int, float>;
|
|
template class X0<int>; // expected-note{{previous}}
|
|
|
|
template class N::X1<int>;
|
|
template class ::N::X1<int, float>;
|
|
|
|
using namespace N;
|
|
|
|
// Check for some bogus syntax that probably means that the user
|
|
// wanted to write an explicit specialization, but forgot the '<>'
|
|
// after 'template'.
|
|
template class X0<double> { }; // expected-error{{explicit specialization}}
|
|
|
|
// Check for explicit instantiations that come after other kinds of
|
|
// instantiations or declarations.
|
|
template class X0<int, int>; // expected-error{{duplicate}}
|
|
|
|
template<> class X0<char> { }; // expected-note{{previous}}
|
|
template class X0<char>; // expected-warning{{ignored}}
|
|
|
|
void foo(X0<short>) { }
|
|
template class X0<short>;
|
|
|
|
// Check that explicit instantiations actually produce definitions. We
|
|
// determine whether this happens by placing semantic errors in the
|
|
// definition of the template we're instantiating.
|
|
template<typename T> struct X2; // expected-note{{declared here}}
|
|
|
|
template struct X2<float>; // expected-error{{undefined template}}
|
|
|
|
template<typename T>
|
|
struct X2 {
|
|
void f0(T*); // expected-error{{pointer to a reference}}
|
|
};
|
|
|
|
template struct X2<int>; // okay
|
|
template struct X2<int&>; // expected-note{{in instantiation of}}
|
|
|
|
// Check that explicit instantiations instantiate member classes.
|
|
template<typename T> struct X3 {
|
|
struct Inner {
|
|
void f(T*); // expected-error{{pointer to a reference}}
|
|
};
|
|
};
|
|
|
|
void f1(X3<int&>); // okay, Inner, not instantiated
|
|
|
|
template struct X3<int&>; // expected-note{{instantiation}}
|
|
|
|
template<typename T> struct X4 {
|
|
struct Inner {
|
|
struct VeryInner {
|
|
void f(T*); // expected-error 2{{pointer to a reference}}
|
|
};
|
|
};
|
|
};
|
|
|
|
void f2(X4<int&>); // okay, Inner, not instantiated
|
|
void f3(X4<int&>::Inner); // okay, Inner::VeryInner, not instantiated
|
|
|
|
template struct X4<int&>; // expected-note{{instantiation}}
|
|
template struct X4<float&>; // expected-note{{instantiation}}
|
|
|
|
// Check explicit instantiation of member classes
|
|
namespace N2 {
|
|
|
|
template<typename T>
|
|
struct X5 {
|
|
struct Inner1 {
|
|
void f(T&);
|
|
};
|
|
|
|
struct Inner2 { // expected-note {{here}}
|
|
struct VeryInner {
|
|
void g(T*); // expected-error 2{{pointer to a reference}}
|
|
};
|
|
};
|
|
};
|
|
|
|
}
|
|
|
|
template struct N2::X5<void>::Inner2;
|
|
|
|
using namespace N2;
|
|
template struct X5<int&>::Inner2; // expected-note{{instantiation}}
|
|
|
|
void f4(X5<float&>::Inner2);
|
|
template struct X5<float&>::Inner2; // expected-note{{instantiation}}
|
|
|
|
namespace N3 {
|
|
template struct N2::X5<int>::Inner2; // expected-warning {{explicit instantiation of 'Inner2' not in a namespace enclosing 'N2'}}
|
|
}
|
|
|
|
struct X6 {
|
|
struct Inner { // expected-note{{here}}
|
|
void f();
|
|
};
|
|
};
|
|
|
|
template struct X6::Inner; // expected-error{{non-templated}}
|
|
|
|
// PR5559
|
|
template <typename T>
|
|
struct Foo;
|
|
|
|
template <>
|
|
struct Foo<int> // expected-note{{header not required for explicitly-specialized}}
|
|
{
|
|
template <typename U>
|
|
struct Bar
|
|
{};
|
|
};
|
|
|
|
template <> // expected-warning{{extraneous template parameter list}}
|
|
template <>
|
|
struct Foo<int>::Bar<void>
|
|
{};
|
|
|
|
namespace N1 {
|
|
|
|
template<typename T> struct X7 { }; // expected-note{{here}}
|
|
|
|
namespace Inner {
|
|
template<typename T> struct X8 { };
|
|
}
|
|
|
|
template struct X7<int>;
|
|
template struct Inner::X8<int>;
|
|
}
|
|
|
|
template<typename T> struct X9 { }; // expected-note{{here}}
|
|
|
|
template struct ::N1::Inner::X8<float>;
|
|
|
|
namespace N2 {
|
|
using namespace N1;
|
|
|
|
template struct X7<double>; // expected-warning{{must occur in namespace}}
|
|
|
|
template struct X9<float>; // expected-warning{{must occur at global scope}}
|
|
}
|